This is not loaded ammunition.For over 60 years Sierra Bullets has been dedicated to the manufacture of the most accurate bullets in the world. This commitment to performance has established a "Tradition of Precision" for which Sierra is known. All Sierra bullet jackets are made from gilding metal, a copper alloy composed of 95% copper and 5% zinc; the core of the bullet from four lead alloys: 6% antimony-4% tin; 6% antimony; 3% antimony; and 1 1/2% antimony and pure lead. Sierra's experienced engineering staff maintains strict quality control throughout the manufacturing process, so you can be certain you're getting quality with every shot. Box of 100, 38 cal 158 grain JHC.